Void Runner Demo Creation

Let me understand the situation. The task says "Wake up and do as you please." The last execution created demo 007-sonic-reactor. So now I should create a new demo — probably 008-something. Let me first check the current state of the demos folder to see what exists.

Let me install shell tools first.

Let me check the current state of the demos folder.

The demos folder has 7 demos. The task is "Wake up and do as you please." Based on the pattern, I should create a new demo (008). Let me look at the existing demos to understand the style and then decide on a new demo concept.

Let me check what the existing demos are about, then pick something new. Let me quickly view the index to see the descriptions.

The existing demos are:

1. Spinning Cube - basic
2. Nebula Galaxy - particle galaxy
3. Mandelbulb Explorer - ray-marched fractal
4. Fluid Dynamics Playground - GPU Navier-Stokes
5. Gravity Sandbox - N-body orbital
6. Event Horizon - black hole lensing
7. Sonic Reactor - audio-reactive visualizer

For demo 008, I need something new and impressive. Ideas:

• Procedural terrain / planet explorer with shader-based terrain, water, atmosphere, flying camera — a classic wow demo.
• A playable mini-game: 3D Snake, Asteroids, Breakout, endless runner, space shooter.
• Ray-marched scene (already have mandelbulb).
• Volumetric clouds / weather simulation.
• Cloth / soft-body physics.
• Maze generation + FPS walkthrough.
• City flyover with procedural generation.
• Flocking boids simulation (GPU).
• Water/ocean simulation with FFT waves (Gerstner waves).
• Game of Life 3D / reaction-diffusion.
• Portal / wormhole tunnel.
• Asteroids-like space shooter with physics, HUD, sounds — a playable game would add variety.

Given the guidelines mention "playable mini-games (asteroids, snake 3D, orbital simulators)" as good examples, and there's no playable game yet, I could create a game. Alternatively, a procedural ocean/planet is very "wow".

Let me think about what would be most impressive and different from existing demos. We have: particles (galaxy), fractal ray-marching, fluid sim, gravity sim, black hole shader, audio visualizer. Missing: gameplay, procedural terrain, ocean waves, volumetric clouds, flocking, character animation.

A great pick: "Void Runner" — an endless 3D runner/dodger game with a synthwave aesthetic: infinite procedurally generated track/obstacles, instanced geometry, bloom, speed lines, HUD with score, shield/health, power-ups, synthesized sound effects via WebAudio, keyboard/pointer controls. That's very "wow" and adds gameplay variety.

Or "Astro Miner / Asteroids 3D" — fly a ship in an asteroid field, shoot asteroids that split, with physics, HUD, radar, sounds.

Or "Ocean World" — Gerstner waves ocean with island terrain, sky, sun, flying camera, underwater fog toggle. Very pretty but not interactive gameplay.

Or "Cloud Chamber" — volumetric clouds via ray-marching (real-time volumetric). We already have two ray-marching demos though (mandelbulb, event horizon).

I think a playable game adds the most variety. Let me design "VOID RUNNER" (008-void-runner):

Concept: A high-speed endless runner through a neon synthwave canyon/space corridor. You pilot a hover-ship (third-person chase camera), dodging procedurally generated obstacles (instanced cubes/rings/walls), collecting energy orbs, with increasing speed. Features:

• Endless procedural track: a long "tube"/canyon made of segments, recycled in a pool.
• Obstacles via InstancedMesh: blocks, rotating rings, gates — spawned ahead, recycled behind.
• Player ship: simple stylized ship built from primitives, banking on turns, strafing with pointer or arrow keys.
• Speed increases over time; score = distance; collisions reduce shields (3 hits, brief invincibility + screen shake + flash).
• Energy orbs restore shield slightly / add score multiplier.
• Post-processing: UnrealBloomPass + subtle vignette; motion feel via FOV widening with speed + speed lines particles.
• Synthwave aesthetic: sun gradient backdrop, grid floor, retro color palette, fog.
• HUD: score, speed, shield bar, distance, multiplier; game-over screen with restart; pause.
• WebAudio: synthesized engine hum (oscillator pitch tied to speed), whoosh on near-miss, pickup chime, crash noise, and a light synthwave music loop (bass arp) — all procedural, no assets.
• Keyboard (arrows/AD), pointer drag, and touch support. Space to pause. R to restart.
• lil-gui panel for bloom, music/sfx volume, difficulty, FOV, toggles.
• Snapshot button maybe.

That's a big build but doable. Alternatively "Neon Asteroids" — 3D asteroids in bounded arena, shoot, split, wrap. The runner is more visually driven and gives the infinite world + synthwave look that's very "wow". Let me go with the runner.

Actually, let me consider "Asteroids 3D" more: free-flying with 6DOF controls can be disorienting; the runner has simpler controls and a more striking presentation (speed, FOV kick, tunnel of neon). Runner it is.

Let me verify CDN availability for three r160 + addons used in previous demos (they used unpkg or cdnjs). Let me check what the previous demo used so I keep consistent.

Let me look at the head of 007-sonic-reactor/index.html to see the import map and structure conventions.

The recent demos use jsdelivr for three@0.160.0. I'll keep that convention.

Now let me plan 008-void-runner in detail. This is a substantial build. Let me be careful with code quality and structure, and validate the JS with node --check afterwards. No custom GLSL shaders are strictly needed (I can use built-in materials), but I could add a shader for the sky/sun backdrop and the grid floor for extra wow. Let me design:

008-void-runner — "Void Runner": a synthwave endless dodger.

Scene structure

• Renderer with UnrealBloomPass + OutputPass (EffectComposer).

• Camera: chase cam behind ship, FOV widens with speed.

• Background: gradient sky dome (custom shader, synthwave sunset: deep purple top → orange horizon), big retro sun (circle with scanline stripes shader) on horizon, stars (Points), distant mountain silhouettes (two jagged ridges via geometry or simple cones mesh, fog-faded).

• Grid floor: infinite scrolling grid — use a large plane with a custom shader (grid lines with distance fade + fog), scroll uOffset by distance traveled. Classic synthwave look.

• Fog: FogExp2 dark purple.

• The "track": the player flies along -Z (or +Z; choose -Z forward). World moves toward the player; actually simpler: keep the player at z≈0 and move obstacles/segments toward +Z. Standard runner approach: objects spawn at z = -spawnDistance and move toward +Z at speed; recycle when z > 20.

• Track corridor: side rails / pylons: instanced neon pylons on both sides scrolling past (InstancedMesh, emissive). Also floating "gates"/rings occasionally.

• Obstacles (InstancedMesh or individual meshes pooled):

  • Blocks: emissive-edged boxes at random lanes/heights (some low to fly over? Player has fixed height, strafe in X only... To add depth, allow vertical movement too (up/down within a range), controlled by pointer Y or W/S. That makes 2D dodging within a plane — good gameplay.)
  • Rings: pass through for bonus (torus, emissive) — reward risk.
  • Orbs: energy pickups (icosahedron, emissive cyan) — restore shield / score.
  • Walls with a gap: a large wall with a hole you must align to pass. Could do "gate bars": vertical/horizontal bars leaving gaps.

• Collision: sphere-vs-AABB approx in the XY plane at z crossing — when an obstacle's z passes the player plane within threshold, check distance.

• Difficulty ramp: speed increases with distance; spawn patterns denser.

• Shields: 3 hits (or 100 energy, -34 per hit, +10 per orb). Hit → screen shake, red flash vignette, invincibility 1.5s (ship blinks), sound. 0 → game over overlay with score/best (localStorage), restart button / R key.

• Score: distance + orb bonuses; near-miss bonus with "NEAR MISS +50" floating text? Keep it simpler: near-miss gives combo multiplier and toast.

• HUD: top-left title + description; top-right score/speed/shield bar; game over overlay; start overlay ("click to start", handles audio autoplay).

• Audio (all WebAudio-synthesized):

  • Music: synthwave loop — minor-key bass arp + kick/hat at ~100 BPM, pad chords. Reuse pattern from sonic-reactor concept but different vibe; keep it lighter (bass arp + kick + hat).
  • SFX: engine hum (oscillator + noise, pitch scales with speed), whoosh (filtered noise burst) on near-miss, pickup chime (two-note), hit (noise burst + low thump), game over sweep.
  • Music/SFX volume sliders in GUI; M mute.

• Controls:

  • Pointer/drag or touch: ship follows pointer position (mapped to XY playfield). Arrow keys / WASD: velocity-based steering. Combine: keyboard sets target too.
  • Space: pause. P also pause. R: restart. M: mute. S: snapshot. H: hide UI.

• lil-gui: music volume, sfx volume, bloom strength, speed (base), difficulty (spawn density), FOV effect toggle, screen shake toggle, auto-pilot demo mode? An "attract mode" autopilot could be cool for the start screen — ship dodges automatically with simple AI (move toward lane with most clearance). Nice: start screen shows autopilot playing. That's a lovely touch and shows off visuals. Implement simple autopilot: look ahead at obstacles near player z within lookahead, compute target X/Y toward gaps/orbs. Simple heuristic: pick orb target if safe, else move away from nearest obstacle.

Performance considerations: use pooled meshes, InstancedMesh for pylons/stars/particles; obstacles as pooled individual meshes (counts small, <60 active). Explosion particles: a pooled Points burst system or small mesh pool with additive sprites. Speed lines: a Points system of streaks in a cylinder around camera, stretched with speed (use THREE.Points with custom size + opacity by speed; stretch via vertex shader optional — simpler: use thin elongated boxes instanced, or LineSegments). I'll do a LineSegments-based speedline field, or Points with streak texture... Simplest robust: elongated instanced boxes (box 0.02×0.02×1.2) additive, moving fast toward camera, respawned in a cone. 200 instances.

Ship model: build from primitives in a group: fuselage (cone/cylinder stretched), wings (two flattened boxes), canopy (sphere), engine glow (sprite + point light). Neon emissive edges. Bank roll proportional to lateral velocity; pitch on vertical velocity.

Snapshot: render then canvas.toBlob download — need preserveDrawingBuffer or render right before toDataURL in same frame. Approach used in previous demo: call composer.render() then toDataURL synchronously — works without preserveDrawingBuffer if done right after render in same task.

GUI must not steal keyboard; fine.

Playfield bounds

Playfield: x ∈ [-8, 8], y ∈ [0.5, 9] roughly; camera at z=8ish behind, ship at z=0. Obstacles spawn at z=-140, despawn z>15.

Grid floor at y=0? If ship can go down to 0.5, grid at y=0 fine. Also add a ceiling "inverse grid"? Not needed; add stars.

Speed: base 40 units/s, +0.5/s² ramp up to 120. Distance in "m" = units.

Spawner: pattern-based: every N meters (gap decreasing with difficulty) spawn either: block cluster (1–3 blocks at random lanes), a ring, orb line (3 orbs in a row), wall-with-gap (two big boxes leaving a gap at random x/y). Ensure solvability: walls always have a gap ≥ player size; blocks limited so that not all lanes blocked at same z.

Collision at crossing: track each obstacle's z previous frame vs current; when it crosses z=0 plane (player z), check overlap in XY with thresholds (player radius ~0.8). Blocks: AABB in XY (half extents + player radius). Rings: reward if within ring inner radius of center; if hit the ring band itself (between inner and outer radius), counts as hit? That's harsh; make rings purely bonus: passing through center grants bonus; touching ring does nothing. Orbs: radius check for pickup.

Near-miss: block crossed plane and XY distance within (hitDist, hitDist+0.9) → near miss bonus + whoosh + combo++.

Score: distance1 + orb 25combo? Keep: score += speeddt (distance), orb +50, ring +100, near-miss +25. Multiplier ×(1+combo0.1) for pickups? Simpler: combo adds bonus points escalating: orb = 25 * (1+combo*0.25). Show combo in HUD when >2. Getting hit resets combo.

Engine sound: two detuned saw oscillators through lowpass, freq 40–90 Hz by speed + a noise loop with bandpass whose freq scales with speed; gain tied to throttle (always on while playing). Autopilot start screen: music playing too? Audio requires user gesture; start overlay click resumes AudioContext. So start screen silent until click. Fine: "Click to launch" begins audio + game. Show animated title.

Also add subtle camera roll with banking and slight shake at high speed (micro turbulence), FOV = 60 + speedFactor*25.

Sky shader dome: fragment mixing colors by direction y, plus sun disc: I'll do a separate sun mesh (circle) with scanline shader positioned far on horizon (z=-400, y=~10), big radius 60; with bloom it'll glow. Sky dome: big sphere (radius 500) BackSide with gradient + subtle star twinkle? Stars separate Points with additive material.

Mountains: generate 2 ridge lines of triangles (custom BufferGeometry) at z=-350 and -280, dark purple, emissive wireframe overlay? Classic synthwave mountains: solid dark with neon edge. I'll do filled triangles + a LineSegments wireframe on top, colored magenta/cyan, fog will fade them.

Grid floor shader: plane 600x600 at y=0, shader: grid lines via fract(worldPos/gridSize), intensity fades with distance; scroll by uTime*speed along z; color mixes cyan→magenta by x or distance; horizon glow line. Alpha out edges into fog. Also fade alpha at far distance to blend with fog (use fog manually in shader since custom shader ignores scene.fog unless included; simpler to compute own fade by distance to camera → uniform uCamZ... camera is mostly static; distance in world space fine).

Pylons: instanced boxes along both sides every 8 units from z=-150..20, scrolling: reposition by modulo of (z + distance) — update instance matrices each frame for visible set: 40 instances per side. Emissive gradient by z (cyan near, magenta far) — per-instance color via instanceColor.

Obstacle blocks material: MeshStandardMaterial dark body + emissive edges? For "neon edged box": box with emissive magenta, plus dark core — simplest: MeshBasicMaterial won't bloom-edge. Use MeshStandardMaterial with emissive 2.0 color, plus a slightly larger wireframe box LineSegments overlay? Cost fine with small counts. Alternative: use EdgesGeometry + LineSegments per block pooled. Pool: 24 blocks each = Group(box mesh + edges lines). OK.

Let me also keep code clean & commented. Total file maybe ~1100-1300 lines. That's fine (007 was 50K ≈ ~1300 lines).

Let me think about the autopilot heuristic for start screen:

• While in ATTRACT mode: ship steers toward target: find nearest obstacle crossing within lookahead z in [-60, -5] near ship's X/Y; compute "threat" and pick new targetX/Y: sample candidate positions on a grid (x: -6..6 step 3; y: 2..8 step 3), score each by distance to obstacles (penalize near blocks/walls at their z), add attraction to nearest orb/ring, plus center bias; pick best. Recompute every 0.25s. Works fine.

Music engine: tempo 100 BPM, steps: kick on beats 0,1,2,3 (four on floor), hats offbeat 8ths, bass arp pattern on A minor: A1 A1 C2 A1 E2... simple 16-step pattern; pad: two detuned saws playing Am–F–C–G chords, one chord per bar, through lowpass + slow attack. Keep master gain modest. Scheduler via lookahead 0.12s, timer 40ms, same approach as 007 presumably.

SFX:

• whoosh: white noise buffer through bandpass sweeping 400→2400 Hz, 0.25s.
• chime: two sine notes (E6, B6) quick decay.
• ring bonus: arpeggio of 3 notes.
• hit: noise burst lowpassed + 80Hz sine thump with pitch drop.
• gameover: descending saw sweep 300→60Hz 1.2s + noise.
• start: rising sweep.

Engine: continuous: 2 saws detuned at baseFreq*(0.9+speedFactor1.2), lowpass 300+speedFactor900, plus noise with bandpass 500+speed*4, gains small. Update per frame.

Now the overlay structure: I'll mirror 007's style: #hud top-left, transport bottom bar (Start/Pause, Restart, Mute, Snapshot), #hint bottom, #toast, plus a big #overlay (title screen / game over) and #scoreblock top-right. And #damage vignette flash element (red radial) animated by opacity.

localStorage best score key 'void-runner-best'.

Edge cases: pointer controls — map clientX to [-8,8], clientY inverted to [0.5,9.5]. Keyboard: hold arrows → velocity applied to ship pos directly, and overrides pointer while held (blend: target from pointer; keys add offset velocity). Simplest robust: maintain input.x, input.y targets; pointer move sets them; keys apply velocity to targets clamped. Ship lerps toward target with critically damped smoothing; banking = (shipX - prevX)/dt.

Pause: clock delta halted (use own accumulator: dt from rAF timestamps; when paused skip updates, still render?). Keep rendering but freeze time. Use paused flag; music scheduler continues? Pause music gain to 0 on pause. Simpler: on pause, suspend AudioContext; resume on unpause.

Resize handling standard.

GUI: lil-gui from jsdelivr (check URL used in 007). Let me grep the import of lil-gui in 007.

Also confirm addons: EffectComposer, RenderPass, UnrealBloomPass, OutputPass from 'three/addons/...'.

Let me grep quickly.

Good: node available; glslangValidator not found (exit 1 because which glslangValidator failed). I can install it again like the previous run did (sudo apk add gcompat glslang) — or I can write the demo without custom GLSL and validate only with node. But I do plan a couple of small custom shaders (sky dome, sun, grid floor). I'll validate those with glslangValidator — install it.

Plan:

1. Install glslang.
2. Write /space/demos/008-void-runner/index.html (big file).
3. Extract module script → node --check.
4. Extract shaders → glslangValidator with three.js preamble.
5. Update /space/demos/index.html with new card.
6. Success.

Let me write the demo now. I'll carefully architect the code.

Key parameters:

• Playfield: X ∈ [-8, 8], Y ∈ [0.6, 9.4]. Ship z = 0. Camera at (0, 5.5, 10) looking at (0, 4.5, -20) roughly, following ship x/y partially (camera lerps toward ship position * 0.55 for a dynamic feel).
• Speed: base 42, max 130, ramp +0.55/s while alive. speedFactor = (speed-base)/(max-base).
• Fog: FogExp2 0x0a0518, density ~0.012 — but custom shaders won't use scene fog unless they include fog chunks. For grid floor I'll do manual fade. Standard materials get fog automatically if material.fog = true.

Spawning: track nextSpawnAt distance; gap = lerp(26, 12, difficultyRamp) meters with randomness ±20%. At each spawn, choose pattern:

• 35%: block cluster: 1–3 blocks, each at random lane (x in {-6,-3,0,3,6}±rand, y in {1.5, 3.5, 5.5, 7.5}), block size 1.6–2.8. Ensure at least 2 lanes free: limit blocks per z-plane to 3 with distinct lanes chosen from 5 lanes, leaving ≥2 free.
• 18%: wall: two/three big boxes forming a wall with a gap (choose gapLane from 5 lanes; gap height ~3.2; boxes cover rest). Implement wall as: for each lane except gapLane, a tall box (w 3.4, h 10) at lane x. That's 4 boxes — heavy-ish but pooled fine. Alternatively a single box left and right of gap with widths computed. Simpler: per-lane boxes.
• 14%: ring (torus radius 1.9, tube 0.18) at random x/y.
• 18%: orb line: 3–4 orbs spaced 4 units in z, same lane or gentle diagonal.
• 15%: nothing (breather). Difficulty ramp d = min(1, distance/3000).

Blocks may also have a "low/high" split forcing vertical dodge: since lanes include y rows, clusters naturally do this.

Pool sizes: blocks 40 (each block = group: box mesh + edges line segments), orbs 24, rings 6. Wall boxes reuse block pool with scaled size.

Movement: each active obstacle z += speed*dt. Recycle at z > 14.

Collision detection per obstacle when prevZ < 0 && newZ >= 0 (crossing plane):

• block: |dx| < hw+pr && |dy| < hh+pr → hit. else if within +0.8 margin → near miss.
• orb: if dx²+dy² < (1.4)² at any z within [-1,1] (orbs collected when crossing plane within radius 1.6) → pickup; else recycle when z>14. Orbs also collectible slightly before/after: check while |z|<2 each frame.
• ring: crossing plane: dist = sqrt(dx²+dy²); if dist < inner(1.6) → bonus +100, combo++, sparkle; else nothing (no penalty). If dist within [inner, outer] maybe count as miss of bonus only.

Hit while invincible: ignore. On hit: shields -= 1 (3 shields; display as bar or hearts ▮▮▮), combo=0, screen shake 0.6s, red flash, invincible 1.6s (ship material blink via emissive pulsing/opacity), hit sound; if shields<=0 → game over: explosion (hide ship, particle burst), gameover sound, music stops, overlay shows score + best, "Press R / click to retry". During game-over the world keeps drifting slowly? Freeze obstacles, slow camera drift. Keep rendering with time frozen except particle explosion animation continuing (update particles with dt even in gameover). Nice.

Near-miss: +25 × combo... define combo: increments on orb/ring/nearmiss; bonus = base * (1 + 0.25*combo). Show floating text? Keep toast only for milestones (speed up, combo x5...). Floating text via HTML absolutely-positioned divs pooled, projected from 3D → screen. That's a nice juice element: "+50" rising & fading. Pool 12 divs. Doable and cheap. I'll implement: spawnFloat(text, worldPos, colorClass).

HUD top-right: SCORE, BEST, SPEED (km/h-ish = speed*3.6 rounded), shield pips (3 squares), combo indicator.

Transport bar: Start/Pause toggle button, Restart, Sound (mute), Snapshot. Hint line: "←→↑↓ / WASD or mouse · Space pause · R restart · M mute · S snapshot · H hide UI".

Start overlay: title "VOID RUNNER", subtitle, big "▶ LAUNCH" button, shows controls, best score. While overlay shown and audio not started, run attract mode visually (world scrolling, autopilot ship) — looks gorgeous behind translucent overlay.

Autopilot: in attract mode AND optional "Auto-pilot" toggle in GUI (fun to watch). Controls: target from autopilot when enabled.

Snapshot: composer.render(); renderer.domElement.toBlob → download 'void-runner.png'.

Audio unlock: on first user gesture (Launch click / keydown), create AudioContext, start music (if sound on). If pointer used before launch? Overlay requires click to start anyway.

Music engine (100 BPM, 16th-note scheduler):

• Patterns: bars of Am, F, C, G (A minor pentatonic vibe).
• kick: steps 0,4,8,12.
• hat: steps 2,6,10,14 (offbeat 8ths) + ghost 16ths at low gain randomly.
• bass: 16-step arp per bar around chord root: [r, r+12, r+7, r+12] pattern cycling, saw through lowpass, short envelope.
• lead/pad: chord triad saws, slow attack, one per bar, quiet, lowpass 1200.
• Noise buffer prebuilt. Master chain: masterGain → (musicGain, sfxGain buses) → ctx.destination.

Implement noteFreq(midi) helper.

SFX as described. Engine hum: create on game start (osc ×2 saw detune ±6 cents, gain by speed; noise via bufferSource loop through bandpass). Update params per frame while playing. Suspend when paused via ctx.suspend() — but then scheduled music notes also freeze; fine.

Beat sync? Not needed.

GUI (lil-gui) folders:

• Audio: music (0–1, 0.5), sfx (0–1, 0.7), mute toggle.
• Visuals: bloom strength (0–2, 1.1), bloom radius, grid speed lines toggle (speedlines on/off), shake toggle, FOV kick toggle.
• Gameplay: difficulty (0.5–2, 1), auto-pilot toggle, show hitboxes? no.
• Buttons: Restart, Snapshot, Hide UI.

Keyboard: Space/P pause, R restart, M mute, S snapshot, H hide UI (hud+transport+gui), arrows/WASD steering.

Pointer: mousemove sets pointer target (only when playing & not autopilot); touch: touchmove. Also pointerdown on overlay button etc. Canvas click shouldn't toggle pause (avoid accidental). Fine.

Speed lines: 240 instanced thin boxes (0.015,0.015, len 1.5–3) positioned in cylinder shell radius 6–20 around camera path z in [-60, 10], additive basic material with opacity by speed; each frame z += (speed*2.2)*dt; respawn at z=-60 random. Rotate to align along z — box already aligned. instanceColor slight variation cyan/white/magenta. Hide when speedFactor small.

Explosion: Points pool 300 with velocities, life; on gameover trigger at ship pos; also small burst on block hit (color orange). Implement simple CPU particles: BufferGeometry with position attr updated per frame for active count. Additive, size 0.35, vertex colors per particle fade → use alpha via material.opacity global and per-particle life fade via color darkening (additive blending → darker = dimmer). Good trick for additive: write color *= life.

Also impact sparks for near miss? Skip.

Stars: 800 points on dome radius 300–480, static, additive, slight size attenuation. Colors white/blue-ish varied. Maybe twinkle via per-frame opacity sin — keep static, subtle.

Sun: mesh circle radius 55 at (0, 14, -420) facing camera; shader: stripes (smoothstep bands from y), gradient orange→pink vertically, alpha fades near bottom (below horizon cut). Bloom picks it up. Animate stripe offset slowly downward for that retrowave feel. uTime uniform.

Sky dome: sphere 480 BackSide; fragment: mix(deepPurple, horizonPink, pow(1-max(dirY,0), 3)) + slight dithering. Add faint horizon glow band. Manual.

Mountains: generate ridge geometry: for i in 0..N segments across x ∈ [-400, 400] at z=-330: height = noise-based (use simple sin/noise fn) up to 60; build triangle strip to y=0 → BufferGeometry; MeshBasicMaterial color #1a0b2e (fog affects: FogExp2 will fade mostly — set material.fog true; at that distance with density 0.012, exp2 factor = exp(-(0.012330)^2)= exp(-15.7) ≈ 0 → fully fog color, mountains invisible!). So fog density must be small: 0.0045 → at 330: exp(-(1.485)²)=e^-2.2=0.11 — still mostly fogged. Mountains should ignore fog (fog:false) and bake their own fade via color choice. I'll set mountain materials fog:false with dark purple colors and rely on chosen colors to blend with sky. Grid floor fade manual. Obstacles/pylons: standard materials with fog:true, density 0.0055 gives nice depth at spawn distance 140: exp(-(0.0055140)^2)=e^-0.59=0.55 — obstacles pop in visibly; better spawn fade: scale/opacity ramp? Standard material opacity per instance is messy; accept pop-in softened by fog + darkness. Or spawn at 160 and fog 0.0075: at 160 → e^-1.44=0.24 visible-ish. I'll spawn obstacles with a quick "materialize" scale-in (scale 0.6→1 over first 10 units) — reads as intentional. Simple: scale = clamp(map z from -150→-130).

Ship: group:

• body: cone geometry (radius 0.55, height 2.2, rotated -90° X so nose forward -Z... cone points +Y by default; rotate X by -PI/2 → points -Z? rotateX(-PI/2) maps +Y → -Z? Rotating -90° about X sends +Y to -Z? Rx(-90°): y→(0,0,-1)? Let's compute: rotation about X by angle a: y' = y cos a - z sin a; z' = y sin a + z cos a. a=-90°: cos=0, sin=-1 → y' = z*1? For point (0,1,0): y'=0, z'=-1 → yes points -Z. Good.
• Material: MeshStandardMaterial color #2a2a3e metalness 0.8 roughness 0.35, emissive slight indigo.
• wings: two flattened boxes (1.6, 0.08, 0.7) angled slightly, color darker with emissive magenta edge? Add small emissive strips (thin boxes 1.5,0.03,0.06) on wing tips cyan.
• canopy: sphere scaled, material physical transmission? Keep simple: MeshStandardMaterial color #67e8f9 emissive #155e75 metalness .1 roughness .1.
• engine: two small cylinders at back + point light (magenta, intensity 6, distance 12) + additive sprite glow (SpriteMaterial with radial gradient texture generated on canvas). Generate glow texture via canvas 64×64 radial gradient — no external assets.
• engine flames: two small cones additive, scale pulsates with speed. Ship tilt: rotation.z = -bank (roll) from lateral velocity, rotation.x slight pitch from vertical velocity, rotation.y tiny yaw from lateral vel. Ship bobs subtly with sin(time) when idle.

Camera: position lerp to (ship.x0.5, 4.6 + ship.y0.45, 10.5), lookAt (ship.x0.75, ship.y0.75 + 1.2, -14). FOV: 62 + speedFactor*22, update projection when changed > 0.01. Shake: add random offset * shakeAmt decaying.

Grid floor shader (plane 700×700 rotated -90 X at y=0, center z=-250): uniforms: uTime, uScroll (distance), uColorA cyan #22d3ee, uColorB magenta #f0f, uBase dark. vertex: pass world pos. fragment: vec2 g = abs(fract(wp.xz / cellSize) - 0.5) / fwidth(wp.xz / cellSize); line = 1 - min(min(g.x,g.y),1.0); (anti-aliased grid) Actually standard: vec2 grid = abs(fract(coord-0.5)-0.5)/fwidth(coord); float line = min(grid.x, grid.y); float v = 1.0 - min(line, 1.0); distance fade: d = distance(wp, camPos) → fade = exp(-d0.012)? plus manual horizon blend. Also a moving "pulse" along -z: band = smoothstep for a bright line sweeping with beat? Optional subtle: pulse = pow(0.5+0.5sin((wp.z+uScroll)0.05 - uTime2.0), 8)*0.5. color = mix(base, mix(colA, colB, smoothstep(-80,80,wp.x)) , v) ; alpha = v * fade + horizonGlow. Plane material transparent, depthWrite false. Under it a solid dark plane at y=-0.05 (fog color) to block stars below? Stars are above anyway; sky dome behind. Fine w/o.

Pylons: InstancedMesh box (0.35, 6, 0.35), 2 sides × 36 = 72 instances; z positions i*8 offset by scroll % 8; x=±10.5; y=3; per-instance color lerp magenta↔cyan by index; emissive: use MeshBasicMaterial with vertexColors? InstancedMesh with MeshBasicMaterial + instanceColor works (instanceColor supported by built-in materials). Basic = unlit bright neon — good with bloom. Scale slight per side. Also add horizontal light bars connecting? skip.

Also floating "monoliths" decoration far sides: 10 instanced tetra/octahedra at |x| 25–60, y 5–30, z spread, slowly rotating — parallax depth. Use MeshStandardMaterial dark with slight emissive; fog:true. Rotation per instance update each frame — cheap for 12.

Now, "ensure solvable": blocks limited to 3 lanes of 5 per z row (clusters also offset rows). Walls always leave gap lane with clearance ≥ 2 lanes? gap lane box omitted; adjacent lanes have boxes width 3.4 with lane spacing 3 → gap width 3 - 0 = 3.0 minus ship radius 1.6 → ok (need |dx|<hw+pr to avoid: hw=1.7, pr=0.8 → free if 2.5 away from box center; gap lane center is 3 away → safe at center). Good.

Also spawn no obstacle within first 40m at start ("grace").

Game states: 'attract' (overlay visible, autopilot, no score/hits), 'playing', 'paused', 'over'. Launch → reset(), state playing. Pause toggles. Over → overlay gameover variant. Restart from anywhere → reset + playing.

Score: score += speed*dt while playing (distance meters). Display floor.

Best: localStorage.

Floating texts: pool of divs in #floaters; each has world pos Vector3, life 1s, vy rise; per frame project to screen: vector.project(camera) → x=(v.x*0.5+0.5)*w etc; hide if behind.

Toasts: single #toast div with timeout queue (simple: set text + class show; clearTimeout).

OK, GUI default panel placed top-right; HUD score block also top-right → conflict: put score block top-right below gui? lil-gui default top-right corner; move score block to top-right with margin-top below? Previous demos had HUD top-left, transport bottom. I'll put scoreboard top-right offset with right: 16px; top: 14px and move GUI to left? HUD title is top-left. Put GUI at top-right default and scoreboard top-center-right: right: 16px; top: 14px; overlaps GUI. Solution: scoreboard right: 300px? GUI width ~245px. I'll position scoreboard at right: 16px, top: 14px, and set GUI container style marginTop 64px via gui.domElement.style.top = '64px' — lil-gui is fixed top right; adding top offset works. Simpler: place scoreboard horizontally centered-top (top: 14px, left 50%) as a sleek bar. Center top is free. Do that: centered pill with SCORE | BEST | SPEED | shields pips.

Hide UI (H): hide hud, scoreboard, transport, hint, gui (gui.domElement.style.display).

Now the music scheduler details (self-contained):

Bass osc: sawtooth, gain env 0.001→0.22 exp decay over step*0.9, lowpass 900. Kick: sine 150→42 Hz pitch env 0.12s, gain 0.9 decay 0.25. Hat: noise through highpass 7000, gain 0.12 decay 0.05. Pad: per chord change (bar start): 3 saw oscillators (detune ±5 cents) → lowpass 1100, gain attack 0.4 to 0.06, release at bar end; simple: schedule new chord each bar with gain ramp, stop previous.

Voices created per scheduled step — standard.

SFX functions create nodes on the fly; engine hum persistent nodes created lazily on first start.

Volumes: musicBus.gain = musicVol*0.9; sfxBus similar; master mute → master.gain 0.

Autoplay policy: create AudioContext on 'pointerdown'/'keydown' first gesture; resume if suspended.

Pause: ctx.suspend(); resume on unpause. On mute just master gain 0.

Attract mode: music playing only after gesture... The overlay "LAUNCH" click is the gesture → starts audio + game simultaneously. Fine.

Now write the HTML file. I'll write it in one go with careful comments. Also generate radial glow texture via canvas for sprites.

Edge LineSegments for blocks: EdgesGeometry(BoxGeometry(1,1,1)) shared, LineBasicMaterial color per type; scale group. Block core: MeshStandardMaterial #12101f roughness .6 metalness .4 emissive #31115c low. Edge color: magenta #f472d0 / cyan variants. Rings: TorusGeometry(1.9, 0.16, 12, 48) MeshStandardMaterial emissive cyan 1.6. Orbs: IcosahedronGeometry(0.42, 1) emissive #22d3ee 2.0 + point light? no lights per orb; emissive + bloom enough. Spin orbs/rings per frame.

Obstacle data: pool arrays with objects {active, kind, group, x, y, z, hw, hh, hd, passed, spin...}. Spawner activates from pool.

Block crossing detection: keep prevZ per object; after z += step: if (!obj.passed && obj.prevZ < 0 && obj.z >= 0) evaluate → obj.passed = true. Orbs: if (!obj.passed && Math.abs(obj.z) < 2.2 && dist2d < 1.7) pickup; set passed at crossing too for recycling logic (recycle purely by z>14 anyway).

Near miss margin: within hitDist+1.0.

Ship radius pr = 0.8 (forgiving).

Shield: 3. Orb +1 shield if <3 else +25 score combo. Ring: +100 combo.

Combo: increments on orb pickup, ring, near miss. Display "COMBO ×N" when N≥3.

Milestone toasts at speed thresholds: every 500m: "SPEED UP".

Damage flash: #flash div red radial, animate opacity via JS decay.

Now camera-relative world: all world objects move +Z; ship stays z=0. Stars/sky/sun/mountains static. Grid scrolls via uScroll += speed*dt. Pylons reposition: z = ((baseZ + scroll) % span) - span + 20; update matrices per frame. Monoliths similar with own span, slow rotation.

Speed lines: instanced, z += speed2dt + extra; respawn.

Explosion particles: arrays px,py,pz,vx,vy,vz,life,maxLife,color; spawnBurst(pos, n, colorA, colorB, speed). Update each frame regardless of pause? Only when playing/over states (not paused).

FPS counter in stats line (HUD small) — measure EMA of dt.

Now — code size. This is long; I'll write it carefully. Let me draft the whole file mentally then write.

Structure:

1. HTML head: meta, title "Void Runner — Three.js Demo", CSS.
2. body: #app, #vignette, #flash, #hud (title+desc+stats), #scoreboard (centered top pill), #floaters, #toast, #transport (buttons), #hint, #overlay (dynamic content: title screen / game over), script importmap, module script.

CSS similar palette to 007 but synthwave: #050310 bg, magenta/cyan accents.

Module script outline:

Shaders to validate: skyDome (v/f), sun (v/f), gridFloor (v/f). Speedlines/others use built-ins. Particles use PointsMaterial (built-in). Good — only 3 small custom shaders, all GLSL1-style compatible with three's auto-prepended uniforms (they don't use texture reserved word etc.). I'll validate with glslang using the WebGL2 preamble trick from last time (defined in the summary: wrapped with three's WebGL2/GLSL ES 3.0 preamble). For fragment shaders with gl_FragColor under GLSL3... three r160 with WebGL2 converts GLSL1 shaders automatically. For validation I'll wrap as: #version 300 es + defines (attribute→in etc.) for vertex; fragment: define gl_FragColor as out var. I'll reuse a preamble approach.

Actually simpler validation: since shaders are tiny and standard, I can validate by constructing the full three-style preamble. Let me write the wrapping script accordingly (previous run did similar).

Timing loop: use performance.now() delta clamped 0.05; update only if state playing or attract (attract: world scrolls at moderate speed 30, autopilot flies, obstacles spawn? To keep attract simple & safe: spawn obstacles and autopilot dodges them — it's fine if it "hits" (no damage in attract; just pass through). Actually passing through blocks looks buggy. Options: no obstacles in attract (world = pylons, grid, monoliths, speedlines, occasional rings/orbs purely decorative, autopilot collects orbs for sparkle) — cleaner. I'll spawn only orbs+rings in attract, no blocks. Autopilot steers toward orbs. Looks alive, no jank.

Playing: full spawner.

Distance/score only in playing.

Autopilot target selection: find nearest active orb/ring with z in [-50,-6]; target its x,y; if none, drift toward center (x 0, y 4.5) with gentle sine wander. Also if playing-with-autopilot: avoid blocks: check blocks with z in [-30,-2]: if |block.x - target.x| < 3 and |block.y - target.y| < 3 → adjust target to safest lane: compute lane scores. Implement autopilotTarget().

Keyboard steering: keys held → input vector; ship target += vecspeedLatdt (speedLat ~ 14); clamp. Pointer: on move, set target directly mapped; mode switches: lastInputWins.

Ship update: pos.x = damp(pos.x, target.x, 8, dt) etc.; bank = (pos.x - prevX)/max(dt,eps) → roll = clamp(-vx0.045, ±0.9); pitch = clamp(vy0.03, ±0.5). rotation.z = roll lerp; rotation.x = pitch... sign conventions fine.

Engine light intensity pulse with speed + hit flicker.

OK also the #overlay implementation: function showOverlay(mode) sets innerHTML (title screen: big title, tagline, controls list, best score, LAUNCH button; gameover: "RUN TERMINATED", score, best, RESTART button + hint "press R"). Button click handlers via delegation. Overlay hidden during play. Semi-transparent so attract scene visible.

Transport buttons: btnPlay (⏯ label state), btnRestart, btnSound, btnSnap. Keep enabled appropriately.

Hint text bottom.

Toast implementation with timer.

localStorage keys: 'voidrunner.best'.

Prevent context menu on canvas; prevent arrow-key page scroll (overflow hidden anyway).

Resize: renderer.setSize, composer.setSize, camera aspect, bloom resolution auto.

Snapshot:

Works without preserveDrawingBuffer since same synchronous stack after render.

Now write it. I'll aim for clean, well-commented code. Let me be careful about a few three.js r160 specifics:

• renderer.outputColorSpace = THREE.SRGBColorSpace default in r160.
• toneMapping: ACESFilmic, exposure 1.0–1.2. With bloom + OutputPass (OutputPass applies tone mapping/sRGB).
• InstancedMesh instanceColor: set via mesh.setColorAt(i, color) then instanceColor.needsUpdate.
• LineBasicMaterial linewidth ignored — fine (1px).
• Points with vertexColors + AdditiveBlending.
• Sprite for engine glow: map = canvasTexture, blending additive, depthWrite false.
• Fog: scene.fog = new THREE.FogExp2(0x070313, 0.0052); standard materials fogged; sky/sun/stars/mountains/grid materials fog:false (custom shaders ignore fog anyway; MeshBasicMaterial for stars/mountains set fog:false manually).

Grid floor shader alpha blending with depthWrite false, transparent true; renders over dark background: set scene.background = new THREE.Color(0x050210)? Sky dome covers everything anyway (radius 460 < far 2000). Keep scene.background null; dome provides bg.

Camera far: 1500.

One risk: UnrealBloomPass with many bright basic materials → heavy bloom. Set bloom threshold 0.6, strength 1.0, radius 0.55.

Let me now also double-check the grid shader math for anti-aliased grid:

fwidth needs GL_OES_standard_derivatives in WebGL1 but WebGL2 fine. three r160 uses WebGL2 → OK. For glslang validation as ES 3.0 fine.

Fade: float fade = 1.0 - smoothstep(uNear, uFar, dist); with uNear 40 uFar 320. Horizon glow: float horizon = pow(1.0 - clamp(abs(wp.z+380.0)/40.0, 0.0, 1.0), 2.0) * 0.35; — actually sun is at z=-420; add glow near horizon line z≈-400: band = exp(-abs(wp.z + 400.0)*0.01)*0.5. Pulse sweep: float pulse = pow(0.5 + 0.5*sin((wp.z + uScroll)*0.08 + uTime*3.0), 6.0) * 0.25; color: base grid color mix cyan→magenta across x: vec3 gcol = mix(uColA, uColB, smoothstep(-120.0, 120.0, wp.x)); final: vec3 col = gcol * (v*(0.9+pulse)) + gcol*horizon; alpha = clamp(v*fade + horizon*fade, 0.0, 1.0)*uOpacity; gl_FragColor = vec4(col, alpha);

Vertex: standard projection; compute world position of vertex: plane rotated via modelMatrix — use vec4 wp4 = modelMatrix * vec4(position,1.0); vWorld = wp4.xyz;.

Sun shader: circle geometry (radius 60). uv-based: local position attribute; easier use uv (circle geometry uv covers 0..1 across bounding square? CircleGeometry uv: center 0.5, radius 0.5 — yes).

Hmm simpler: stripes = smoothstep bands: float band = step(fract((vUv.y + uScroll)*12.0), mix(0.9, 0.2, (0.5-vUv.y)*2.0)) for y<0.5 else 1. So gaps widen toward bottom. Alpha = disc * stripes. Color: mix(#ffd319 top? Actually gradient top #ff9a3d → bottom #ff2e88): vec3 col = mix(uColBottom, uColTop, vUv.y); plus slight vertical boost. Multiply 1.6 for bloom. transparent, depthWrite false, fog false.

Sky dome shader:

gl_FragColor = vec4(col,1). side: BackSide, depthWrite false. fog n/a.

Good. Now write everything. I'll write the file via read_write_file write mode in chunks? The tool writes whole content at once; file will be ~50-60KB string — fine in one call hopefully. I'll split into two writes (write then append via replace at marker) to be safe? The write mode supports full rewrite; a single large write should be OK. Let me just do one big write but keep it as compact as reasonable. Actually to reduce risk of tool input size limits, I'll write in 3 parts: part1 (HTML+CSS+body+importmap+script start), then use execute_shell_command with heredoc append? Heredoc in shell with quoted 'EOF' avoids interpolation. read_write_file is cleaner. I'll do: write part 1 to file; then append parts via execute_shell_command with cat >> file <<'HTMLEOF'. Hmm, mixing is fine but heredoc with backticks and $ in JS — quoted heredoc 'EOF' prevents expansion; backticks fine inside quoted heredoc. But the read_write_file tool is safer. It supports only full content or line-range replacement; appending via line-range is awkward. I'll use shell heredocs for appends — deterministic.

Actually simplest: build the file with several cat >> ... <<'EOF' shell calls. Each call moderate size (~15-25KB). Fine.

Let me now compose the code fully, carefully.

Draft key JS pieces to avoid bugs:

State:

Params (GUI):

Obstacles pool:

Block edges share geometry; edge material clone per pool object to allow color variety — 40 materials fine. Or 2 shared materials (magenta/cyan) assigned randomly. Use shared two mats.

blockGeo = BoxGeometry(2,2,2) unit; scale per instance via g.scale.set(sx,sy,sz); hw = sx (half width = 2scale/2 = scale... geometry size 2 → half=1scale). So hw = g.scale.x, hh = g.scale.y.

Spawn functions set scale/pos.

Rings: torus rotated to face +Z? TorusGeometry lies in XY plane facing Z — perfect (ring around z axis). Add point light? no.

Orbs: icosahedron emissive.

Particles:

Speed lines:

Pylons:

MeshBasicMaterial with instanceColor: need material.color white. Works (defines USE_INSTANCING_COLOR).

Monoliths: 14 instanced OctahedronGeometry(1,0) scaled (2-5, 6-14, 2-5), MeshStandardMaterial color #0d0b1d roughness .3 metal .8 emissive #1b0f3a. Positions |x| 24..70, y 4..26, z spread over span 260; per-frame z recycle like pylons (span), rotation.y slow (store per instance phase). Compose matrices each frame.

Ship: build as described. Store refs: ship (group at z 0), engineLight, flameL/R, glowSprite.

Ship per-frame:

Camera:

Spawner (playing only):

Hmm: simpler time-based: spawn when S.dist >= S.nextSpawn; then S.nextSpawn += gap; gap = lerp(30, 13, ramp) * rand(0.8,1.25) / P.difficulty... difficulty higher → smaller gap: gap /= P.difficulty clamp min 8. ramp = clamp(S.dist/2600,0,1). Patterns with weights; ensure first spawn at 70.

Blocks cluster: n = 1 + floor(rand(3ramp+0.5)) max 3; lanes = shuffle([-6,-3,0,3,6]).slice(0,n); each lane: y row from [1.8,3.9,6.0,8.1] pick; size s=rand(1.5,2.6); block at (lane + rand(-0.4,0.4), y, z=CFG.spawnZ + irand(0,2)?? keep same z row with small jitter ≤3 so crossing checks separate) — better same z for fairness: z = spawnZ - rand(0,4) per block fine since each checked individually. Wall: gapLane = pick; for each other lane: block scaled (1.7, 5.2, 1.2) at (lane, 5.0, spawnZ) → covers y 0..10.2 minus... height 5.2 scale → half 5.2 covers y -0.2..10.2. Good wall. Gap lane free. Also add small chance gap is high/low: wall split? Keep simple. Ring: (randX±6, randY 2..8). Orbs line: lane rand, y rand, 3 orbs z = spawnZ, -4, -8.

Attract spawner: every ~26m spawn orb line or ring only; S.dist advances at attractSpeed 30.

Recycle: z > killZ → deactivate (visible=false, active=false).

Collision in updateObstacles:

cross(obj): dx=obj.x-ship.x, dy=obj.y-ship.y;

• block: hitX = Math.abs(dx) < obj.hw + CFG.pr; hitY similar. if hitX&&hitY → onHit(obj). else if within margin +1.1 both → nearMiss.
• ring: d=Math.hypot(dx,dy); if d < 1.55 → ringBonus(obj) else if d<2.15 → toast? nothing. onHit: if S.state!=='playing'||S.inv>0 return; shields--; combo=0; S.inv=1.7; S.shake=1.0; flash(); burst(orange at ship); sfxHit(); if shields<=0 gameOver(); else toast('HULL '+shields). nearMiss: combo++; pts = 25comboMult(); score+=pts; floater('+'+pts, shipPos, '#7dd3fc'); sfxWhoosh(); pickupOrb: obj.taken=true; deactivate with burst cyan; combo++; shields chance: if shields<3 && rand<0.35 → shields++ '+HULL'; else pts=50mult; floater; sfxChime. ringBonus: combo+=2; pts=100mult; floater gold; sfxRing; burst ring color. mult = 1 + 0.25min(combo,12).

gameOver: state='over'; S.speed target 0 (ease); ship.visible=false; big burst; sfxExplode + musicStop (fade master? just stop scheduler and engine); overlay show gameover content; best update.

reset(): clear pools active; ship visible pos (0,4.5); target center; S.dist=0 score=0 shields=3 combo=0 inv=0 speed=base nextSpawn=70 scroll keep (continuous ok) state='playing'; overlay hide; music ensure started.

Launch flow: overlay button → ensureAudio(); reset(); state playing.

Pause: only when playing: state='paused'; overlay pause content? Just transport button label + toast 'PAUSED — Space to resume'; ctx.suspend(). Resume: ctx.resume().

Attract: state='attract'; speed=damp toward 34; autopilot on; spawner decorative; no scoring.

Main update branches:

Speed ramp: S.speed = damp(S.speed, target, 0.5, dt) where target = playing? clamp(CFG.baseSpeed + S.dist0.018, base, max) : attract 34 : over 0. dist += speeddt (playing & attract). scroll += speed*dt always when active.

speedFactor = clamp((S.speed-CFG.baseSpeed)/(CFG.maxSpeed-CFG.baseSpeed),0,1) but at attract speed 34 < base → 0 fine.

Audio engine update with speedFactor.

Music scheduler: setInterval(40ms) while audio on: schedule steps up to now+0.15; only when state playing/attract and !muted — schedule regardless, master gain handles mute; when paused ctx suspended stops time (currentTime frozen) so scheduler naturally pauses. But setInterval continues; scheduling while suspended uses frozen currentTime → schedules only up to +0.15 then waits. OK safe.

Engine hum start/stop with ensureAudio; gains by state.

Music instruments code — compact helper functions kick(t), hat(t,g), bass(t,midi), pad(t, chord).

Pattern: bar = 16 steps; chordIdx = (barCount)%4; bass rel pattern array of 16; play bass when rel[idx]!=null.

Chords (midi): Am: root 45 (A2)? For bass use root-12: A1=33. Let me define chord roots [33,29,36,31]? Progression Am F C G → roots A1 33, F1 29, C2 36, G1 31. Pad chords midi: Am [57,60,64], F [53,57,60], C [48,52,55]→ use C4 60? brighter: C [60,64,67], G [55,59,62]→ G3/B3/D4 ok [55,59,62]. fine.

bassPattern16 = [0,null,12,null, 7,null,12,null, 0,null,12,null, 10,null,7,null] semitone offsets from root; play as 16th notes each step → driving arp.

Lead pluck on offbeats occasionally? skip to keep mix clean; add simple sparkle: every bar step 14 play high pluck (root+36) short — nice.

Mixer: musicBus gain 0.9*P.music; compressor? DynamicsCompressor on master to glue — nice touch, cheap: master → comp → destination.

SFX throttle: whoosh max every 0.12s.

GUI:

Hide UI: toggle class on body 'ui-hidden' → CSS hides #hud,#scoreboard,#transport,#hint and gui via style.

Floaters:

Projection: v.copy(pos).project(camera); sx=(v.x*0.5+0.5)innerWidth; sy=(-v.y0.5+0.5)*innerHeight; if v.z>1 hide.

Overlay content builder:

Title: VOID RUNNER big gradient, tagline, "⟡ dodge the void · collect the light ⟡", controls grid, best, LAUNCH button (id ovBtn). Gameover: RUN TERMINATED, final score + best (NEW BEST! badge if), RETRY button + "press R". Pause: show? I'll do lightweight: center toast-like overlay "PAUSED" via #pauseTag div toggled — simpler than full overlay (overlay would hide scene). Use #pauseTag div hidden by default.

Buttons: transport play/pause toggles pause only in playing/paused; in attract → launch; in over → restart.

Keyboard handling with code keys (KeyW etc. + arrows). preventDefault for arrows/space.

Pointer target mapping:

Use direct lerp mapping with margin: x = (cx/w2-1)(fieldX+0.6) clamped; y = ((1-cy/h))*(fieldYMax+0.8) clamped to min.

Keyboard overrides: while any dir key held, apply velocity to target; pointermove sets flag lastPointer=now; if keys held → keys win (add to target).

Touch: touchmove → pointerToField(touch.clientX...). Also overlay buttons work via click.

OK — also small "stats" line in HUD: MODE, FPS, DIST.

Now shaders code strings. Vertex for sky:

Dome radius 800? camera far 1500; dome 800 fine; depthWrite false, side BackSide, renderOrder -10? Also disable depthTest? Keep depthTest true w/ depthWrite false, drawn first via renderOrder=-10 and material.depthWrite=false — objects always closer than 800 anyway.

Sun positioned z=-420 within far.

Stars sphere shell radius 300–600 random dir, y>-0.05 mostly (allow some below horizon hidden by grid fade anyway). Points material size 1.6 sizeAttenuation false? With sizeAttenuation true at r~400 they'd be subpixel; use sizeAttenuation:false size 1.5px, opacity 0.8, additive, vertexColors subtle variation. Twinkle: skip.

Mountains: two ridges: makeRidge(seedOffset, zPos, colorLine):

Good.

Grid floor plane: PlaneGeometry(900, 700) rotated x -90°, positioned z=-250, y=0. ShaderMaterial transparent.

Also second "ceiling" subtle? skip.

Bloom: threshold 0.55 strength P.bloom radius P.bloomRadius.

ToneMapping ACES exposure 1.05.

Now — code it all. I'll now write the actual file content in ~4 heredoc chunks. Watch out: heredoc quoted 'EOF' so no interpolation; ensure no line in content is exactly EOF. Also avoid ${ accidental? fine quoted.

In HTML template literals inside JS (overlay innerHTML) contain </button> etc — fine.

One caution: writing </script> inside JS strings (overlay HTML) would terminate script tag — avoid by not including script tags in strings (we won't). Also avoid literal <!-- maybe fine.

Let me also add <canvas>-generated glow sprite texture:

Engine flames: ConeGeometry(0.16, 1.0) additive MeshBasicMaterial color #c084fc, rotated to point +Z (backward): rotation.x = Math.PI/2 (cone +Y → +Z? rotateX(+90°): y→z? (0,1,0)→(0,0,1)? Rx(90°): y'=−z? For (0,1,0): y'=cos901 - sin900 = 0; z' = sin901 + cos900 = 1 → +Z. yes.) Position at z=+1.05 behind. scale.z pulse — cone scaled along its length (local Y → world Z after rotation; scale applied before rotation in local space: scale.y affects length). So flame.scale.y = 0.7+speedFactor*1.8+sin jitter; also flame.scale.x/z slight.

Ship geometry orientation: nose -Z (forward). Cone rotation.x=-PI/2 as computed.

Wings: BoxGeometry(1.7,0.07,0.65) at (±0.85,-0.08,0.35) rotated z ±0.28 (swept?) plus vertical stabilizer small. Add neon strip boxes at wingtips emissive basic #22d3ee.

Ship materials fine with scene light: add ambient + directional + hemisphere: ambient #402060 0.6; dir #ffffff 1.2 pos (5,10,6); hemisphere (#3b2a6e, #0a0518, 0.5). Plus magenta point at ship.

Alright, also obstacle emissive edges will bloom nicely; core MeshStandardMaterial lit by dim lights mostly emissive-driven look.

Time to write. I'll be methodical. Also remember: no OrbitControls in this demo (game). Camera fixed chase. Mention in HUD controls.

Additionally implement WebGL fail check? Assume fine.

Let me carefully write chunk by chunk.

Chunk 1: HTML head + CSS + body elements + importmap + start of module script (helpers/config/audio-less parts up to scene setup). Chunk 2: environment (shaders, stars, mountains, grid, pylons, monoliths, speedlines) + ship + pools. Chunk 3: audio engine + sfx. Chunk 4: input, autopilot, spawner, collisions, floaters/toast/overlay, GUI, loop.

Total maybe 1400 lines. Good.

Careful details:

• renderer = new THREE.WebGLRenderer({antialias:true, powerPreference:'high-performance'}); setPixelRatio(min(devicePixelRatio,2)); setSize; toneMapping ACES; exposure 1.05. (No preserveDrawingBuffer; snapshot handled by immediate toDataURL.)

• composer with RenderPass, bloom, OutputPass. composer.setPixelRatio too? EffectComposer has setPixelRatio. yes call it.

• Resize: update camera aspect, renderer+composer setSize.

• Fog color #070313, density 0.0052. Blocks spawn at -150 fade in via materialize scale anyway; monoliths/pylons are Basic/Standard with fog default true → pylons Basic will fog to bg color far away, nice. MeshBasicMaterial respects fog by default (fog:true default). Good.

• Rings material emissive intensity 1.8 color #22d3ee; orbs #67e8f9 emissive 2.2; block edges #f0abfc / #67e8f9 alternate; block core emissive #2a1140*0.7.

Ring inner radius for bonus: torus radius 1.9 tube 0.16 → inner hole ~1.74; bonus threshold d<1.5 to be fair.

• Ship scale overall 1.

• Points particles geometry with dynamic draw usage.

• THREE.MathUtils could be used but custom helpers fine.

Edge case: localStorage may throw in some sandboxes — wrap try/catch.

Autoplay: ensureAudio called on overlay button click & keydown (first). In attract before gesture: silent.

Music start: startScheduler() sets interval; barCount etc; nextStepTime = ctx.currentTime + 0.1.

Also stop music on gameover? Keep music playing (nice) — yes keep, just engine hum stops, explosion sfx. Good, less code.

Volumes apply: musicBus.gain.value = P.music*0.85 (muted→master 0).

Now — potential pitfall: scheduling pad chords each bar uses bar start time; implement in scheduler when step%16===0 → schedulePad(t, chord) and also stop previous pad at t (padNodes array with gain ramp). Implement pad as: create 3 osc + gain; gain.gain: setValueAtTime(0.0001,t), linearRamp(0.05, t+0.6), then setTargetAtTime(0.0001, t+barDur-0.3, 0.2); osc.stop(t+barDur+1). Overlapping chords fine.

Kick(t): osc sine f0 160 exp→44 over 0.11; gain 0.9→0.001 over 0.24; plus click: tiny noise burst? skip. Hat(t,g=0.1): noise bufferSource 0.05 through highpass 7500 gain env decay 0.045. Bass(t,m): osc saw midi2f; gain 0.001→0.30 exp over 0.01 then exp decay to 0.001 over 0.22; lowpass 800+? fixed biquad lowpass 1000 Q1. note length step*0.9. Pluck(t,m): square osc, gain 0.06 dec 0.18, highpass 1200? fine.

Noise buffer: 1s white.

SFX: whoosh: src noise 0.3s → bandpass (freq ramp 500→2600, Q 2.5) → gain env 0.25→0.001. chime: two sines 1318.5 (E6), 1975.5 (B6)? midi-based: 88 & 95? E6=88? midi 88 = E6 yes (A4=69 → E6 = 69+19=88). gains 0.12 decays 0.35, slight detune stagger 0.03. ring: plucks [88,91,95] stagger 0.05, gain 0.1. hit: noise 0.25 lowpass 900→200 + sine 90→38 0.3 gain 0.5. plus master small distortion? skip. explode: noise 1.1s lowpass 1400→80 gain 0.8 dec exp; sub sine 70→30 0.9s gain 0.7. launch: saw 180→880 0.5s gain 0.15 + chime.

Engine: eng = {o1,o2 saw detune ±7 cents freq base 55, g gain 0.0→set per frame target (0.05+sf0.12) * (playing?1: attract 0.5: 0), lp lowpass 320+sf950, noise buffer loop → bp 500+sf2200 Q1.2 → ng gain 0.02+sf0.08}. Per frame set with setTargetAtTime smoothing 0.05. Use direct .value assignments smoothed by dt lerp — simpler: keep targets; value assignment each frame is fine (no zipper at 60fps mostly; use setTargetAtTime anyway cheap).

Engine create on ensureAudio; store nodes.

Now writing the file. Also GUI import path 'three/addons/libs/lil-gui.module.min.js' as 007.

Let me write chunk 1 now.

Also remember meta description + favicon? Previous demos maybe had emoji favicon via data URL; check quickly? Not critical. I'll add a simple emoji favicon link data URL (👾) — harmless.

Font: system-ui like others; add letterspacing. Big overlay title uses gradient text like HUD h1.

CSS classes: .hidden{display:none!important}. body.ui-hidden #hud etc display none.

Write chunk 1:

**************************************************************************************************************************************************************************************************r).

I'm at 77.6% of the time threshold already?! That's concerning. Wait — timeProgress 0.77593 means 77.6% of max time used? That seems very high for just starting. Hmm, "threshold": 50, "timeProgress": 0.77593. Maybe the time budget is nearly exhausted. I need to move fast.

Given the time pressure, I should accelerate drastically. Let me write the remaining chunks quickly but still completely, then validate and update index, then finish. Let me not skimp too much but be efficient. I'll write chunk 2 (environment + ship + pools), chunk 3 (audio), chunk 4 (input/spawner/collisions/UI/loop) in rapid succession — combine into 2 bigger writes to save round trips.

Let me write chunk 2+3 together, then chunk 4, then validate, update index, done.